Excavating dipper



June 2, l1925 1,539,863'

E. L. PEMBERTON xcAvATmG mman Filed nec. s. 1923 s sheets-sheet 1 AQQQQQQQQQQQQQ INVENTOR June 2, 1.1925.

1,539,863 E. l.. Pl-:MBERTON EXCAVATING .DI'FER Filed Deo. 5. 1923 3 Sheets-Sheet 5 f5 @QM 1K afi@ W Q s; 5I

@[0 o o c INVENTOR Y wihLL/ORNEYS,

Patented Jur-xe 2, 1925.

UNITED STATES EDWARD LOUIS PEMBERTON, 0F NEW YORK, N. Y.

EXCAVATING- DIPPER.

Application led December 3, 1923. Serial No. 678,089.

To aZZ whom t may concern:

Be it known that I, EDWARD L. PEMBER- TON, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Excavating Dippers, of which' the following is a specification.

This invention relates to excavating dippers, shovels, or the like, particularly adapted for use with excavating machines, an object of the invention being to provide an improved excavating dipper or the like' which will be so constructed as to more efiiciently and effectively withstand the shocks and strains to which the dipper or shovel is subjected in use, and which will resist the tendency of the connected 'parts to separate due to the shearing, of the connecting rivets or bolts.

A further object of this invention is to provide an excavating dipper or shovel having improved means for connecting the front and back parts of the di'pper together so that the danger of these parts separating under excessive shock or strain will be effectively minimized.

A further object of this invention is to provide an improved excavating dipper or shovel having a renewable heel band attached to the front of the dipper in such manner that the tendency of the heel band to work ofi' during use will be eliminated.

A further object of this invention is .to provide an improved means for attaching the latch keeper to the dipper front.

Other objects of this invention will appear in the following description and appended claims thereof reference being had to lthe accompanying drawings forming a part of this specification, wherein like reference` characters indicate corresponding parts in the several views and wherein Fig. l is a perspective view partly in section illustrating particularly the manner in which the parts are assembled; Fig. la is a fragmentary perspective View of one Side of the dipper front; Fig. 2 is a top plan View of the dipper body; Fig. 3 is a side view thereof; Fig. i is a sectional view taken substantially on line 41E-4 of Fig. 3; Fig. 5 is a sectional view taken substantially on line 5 5 of Fig. 3; Fig. 6 is a sectional view taken substantially on line 6-6 of Fig. 3; Fig. 7 is a sectional view taken substantially on line 7-7 of Fig. 3;

Fig. 8 is a front view illustrating the dipper front; Fig. 9 is a fragmentary sectional view taken substantially on line 9--9 0f Fig. 8; and Fig. l0 is a fragmentary seo; tional view It aken substantially on line 10-10 of Fig. 8.

Before explaining in detail the present improvement and mode of operation thereof, it is desired to have it understood that the invention is not limited to .the details of construction and arrangement of parts which are illustrated in the accompanying drawings, since the invention is capable of other embodiments, and that .the phraseology which is employed is for the purpose of description and. not of limitation.

In the construction of excavating dippers or shovels, or the like, it is ha well known fact that the dippers, in order to have any practicable value for excavating operations, and to last any substantial period of time, should be constructed so as to withstand the severe and excessive shocksor strainsxto' which the dipper or shovel is constantly subjected in use and operation. It is important therefore that the front and back members of the dipper body be connected together so that when great stress is placed upon the front of the dipper while digging or excavating, that the rivets or bolts for connecting together the front and back members will not shear off and cause the parts of the dipper body to separate. The main disadvantage of dippers or shovels heretofore constructed resides in the fact that the stresses and shocks of excavating or digging are entirely transmitted to the connecting rivets or bolts so that frequently these connections shear off or break, thereby fracturing the dipper or shovel. It is the purpose of the present invention to eliminate these disadvantages and to provide an excavating dipper or shovel wherein separate side plates are utilized for connecting together the front and back members of the dipper, and wherein these side plates are so interlocked with the front and back that the shocks or strains imparted to the dipper front will be directly absorbed by such interlocking connections, thereby preventing the tendency of the connecting rivets to shear.

In the drawings wherein a present preferred form of my invention is illustrated, it will be seen that the present improved dipper body comprises a back 9, a front 10,

is rovided at the upper part thereof vwith a orwardly extending projection or flange 14, and it is also provided at the vbottom thereof with a forwardly extending projection or flange 15, the projections14 and 15 extending from the free edges 16 of the sidel portions 13.

Each side portion or extension 13 of the dipper back is provided with a vertically extending rib or key 17 which preferably terminates along the free edge 16 of each side portion 13, and each of these ribs .17 projects inwardly beyond the inner faces of the projecting portions 14 and 15. Inv

casting .the dipper body the latter is provided at opposite sides thereof with enlarged or thickened portions 18 and in front of these portions each side of the dipper back is provided with a vertically extending recess, groove or keyway 19. It will be seen from this construction thateach recess or groove 19 forms a shoulder 20 extending inwardly beyond the planel of the ribs 17.

The dipper frontis cast in substantially U-shaped form so as to provide rearwardly extending sides or extensions 21. The upper part of each side portion 21 of the dipper lfront is provided with a rearwardly-extending portion or flange 23 which extends from the free edge 22 of the side 21. At the bottom of each side 21 the dipper front is provided with a rearwardly extending flange or projecting portion 24, which in the present instance corresponds in width substantially to the part 15 of the dipper back. At each side edge 22 of the dipper front the latter is provided with a protecting rib or key 25 which extends vertically substantially from top to bottom thereof. The ribs 25 at each side thereof preferably extend not only along the free edge 22 but also the height of the flange portions 23 and 24, thereby forming inwardly extending shoulder portions. j It will be noted that the major portion of the sides 21 of the dipper front have a greater thickness than the flange portions 23 and 24, the dipper front being cast so as to provide recesses at opposite sides thereof which terminate in shoulders 29.

AThe mouth of the dipper front flares upwardly as shown at 26, and this part of the dipper front is also of greater thickness than the flange portions 23 and is cast so as to provide at each side of the dipper a horizontally extending overhanging ledge or shoulder 27 extending inwardly from each flange 23 and rearwardly-as far as the shoulder 29.

The back 9 and front 10 of the dipper are connected together in the present instance by means of side plates or panels 11 and 12 which are preferably of substantiallv similar construction. Each side plate adjacent to the front edge thereof 'is provided with a vertically extending groove, recess or keyway 30 having a width and depth sufflcient to ieceive the rib or key 25. Adjacent to the rear edge of' each side plate the latter is provided with a similar keyway or groove 30 ada ted to rece-ive the rib or key 17 Interme iate the recesses 30 and 30 and extending downwardly a suitable distance from the top of each side plate, a projection or rib 31 is formed and preferably having a length substantially the same as the width of the flange 14 of the back member. Between the recesses 30 and 30 each side p late is also provided with a projecting port1on 33, the upper edge thereof extending horizontally along the lower end of the rib 31 and forming a horizontal shoulder or ledge 34. Each side plate is also provided at the bottom thereof with a projecting portion 35 which terminates at opposite side edges so as to provide spaces 36 and 37 of a Width corresponding to the width of the flanges 15 and 24. It will be seen that the grooves or recesses 30 and 30a of each side plate form a vertically extending rib 32 along the rear edge of the side plate and also a vertically extending rib 32 along the front edge oi the side plate.

In assembling the front, back, and side plates forming the dipper body, it will be seen that this can be readily accomplished merely by fitting or sliding the ribs 17 and 25 into the channels or grooves 3U and 30 and then riveting or bolting the side plates to the front and back as indicated in the drawings. 1n assembled position it will be noted that the upper or front end edge of' each side plate abats against and is overlapped by the overhanging ledge o1- shoulder 27. The front rib 32 of' each side plate will extend into the recessed portion of the side 21 of the front and will abut against the shoulder 29. The fre-e edge 28 of each projecting portion or flange 23 will engage one side of a rib 31, and the lower .free edge 34a of this projecting portion 23 will rest upon or engage the shoulder 34 of projection 33 of the side plate. Furthermore the free edges of flange ortions '24 and 15 will engage opposite sides of the projection of each side plate, and the forward free edge of each flange 14 will abut against a rib 31 while the bottom edge oteach-flange will engage the ledge 34. The rib 32 at the rear edge of each side plate will extend into a groove or recess 19 and Will abut against a shoulder 20 of the back member.

From the foregoing construction it will be readily seen that the various projecting parts and recesses of the front, back and side members not only overlap one another in transverse directions but also interlock in transverse directions, so that as a result the strains or stresses imparted Ato the cutting edge of the dipper in various directions will I be effectively taken up by the interlocking connections liereinbefore described, thereby to a substantial extent taking excessive strain from the rivets or bolts which connect the side plates to the front and back.

With reference particularly to Figs. 8 to 10 inclusive it will be seen that the front member 10 of the dipper body is cast so as to provide the usual upper' transverse rib 41, vertical ribs 42 and lower transverse rib 43, these ribs being preferably cast integrally with the dipper front and forming a means for strengthening the saine.

Around the lower edge of the dipper front the same is provided with a recess 44, and housed in this recess is a heel band 45 which in the present instance is formed in two .parts terminating at the front to provide a recess 45a for receiving a part of the latch keeper as hereinafter described. It will be seen that the recess 44 forms at the top thereof a shoulder46 against which the upper edge of the heel band 45 engages, and at its lower edge the dipper front is offset at .4T to provide a shoulder. The lower edge of the heel band 45 is provided with a corresponding recess forming a shoulder overlapping the shoulder or offset portion 47, as shown clearly in Fig. 9. The outer face of the heel band extends in the same plane as the outer face of rib 43. The parts of the heel band 45 are riveted to the dippel front and it will be seen that by virtue of the overlapping shoulder portions formed by offset 47 and the corresponding recess in the heel band, the downward strains imparted during use to the heel band are taken up by the offset 4T so that the tendency of the rivets to shear is prevented. It Will be further seen that by virtue of the foregoing construction the heel band may be readily renewed after it is worn merely by removing the rivets or bolts which connect it to the dipper fron-t. Furthermore by housing the heel band 45 in the recess 44 and by interlocking it with the integrally formed offset 4T, the tendency of the heel band to work oil3 in service due to the shearing of the rivets is eliminated.

A latch keeper 4S which is bifurcated to provide attaching arms 49 and 50, is secured to the dipper front. The attaching arm 49 extends into the space 45a between the ends of the tivo parts of the heel band 45, and the attaching arm 50 is housed in a recess 51 formed opposite the space 45 on the interior face of the dipper front. The recess 51 forms a shoulder 52 against which the upper end of attaching arm 50 abuts. The dipper front is thickened at 53 so that the outer lface of this part will be flush with the outer face of attaching 4arni 49, while it will be noted that the outer face ot' attaching arin 50 also extends in the plane of the inner face of the dipper front. The attaching arms 49 and 50 of the latch keeper are riveted' to the lower edge of the dipper front, and since the part 50- is housed in the recess51, there will be no tendency of this part to obstruct the flow of material through the dipper as has been the case in dippers heretofore constructed.

Thus it will be noted from the foregoing that the opposite longitudinal edges of the panels 11 and 12 arc confined by recesses 19 and projecting 'portions 18 as well as the i'ecessed portions and shoulders 29 carried by the confronting side extensions 13 and 21 respectively, thus forming smooth unobstructed surfaces throughout the interior of the dipper and preventing obstruction to the How of material into and out of the dipper and eliminating Wear on the edges of the panels.-

Furthermore the interlocking connections between the latch keeper and dipper front and between the heel band and dipper front provide unobstructed surfaces at the inside and outside of the dipper. In addition it is to be noted that the overlianging shoulders 2T carried by the front member confine the front-end edges of panels 11 and 12 thereby protecting the same and takingconsidcrable strain therefrom.

Also it will be observed that the panels are provided with means including the projeoting portions 31 and 36 for confining and protecting the confronting edges of the ex- 'Hui tensions 13 and 21 against Wear and strain. i

By connecting the panels so as to overlap the inner faces of these extensions a stronger dipper is provided, since the strain against the panels is greater from the inside outwardly, and this outward strain is taken up largely by the side extensions rather than the connecting rivets.

Each panel 12 is provided with a bail connecting aperture 60 located between the grooves 30 and 30a, and the extensions 23 of the front member arel provided with bail connecting apertures 61 alined therewith as shown in Fig. 5. By this construction the strain transmitted from the bail (not shown) to the dipper is taken up by both the front member and side panels.

It is to be understood that by describing in detail herein any particular form, structure or arrangement, it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

Having thus explained the nature of my said invention and described a way of constructing and using the same, although panels, each side panel overlapping the inner faces of said extensions and terminating short of the inner face of said back member,

veach panel having interlocking connections with a pair of confronting extensions to form an unobstructed inner surface from front to rear of the panel.

3. In an excavating dipper, the combination of a front member and a back member having confronting side extensions, and side panels, each side panel overlapping the inner faces of ,said extensions and terminating short of the inner face of said back member, each panel having interlocking connections with a pair of confronting extensions to form unobstructed inner and outer surfaces from front to rear of the panels.

4. In a dipper, the combination of a front member and a back member having confronting side extensions, and a pair of side panels, each panel terminating short of the back member and overlapping the inner sides of a pair of extensions, each panel and an adjacent pair of extensions having cooperating interlocking connections including means for confining the opposite long1- tudinal edges of the panel to provide an interior unobstructed surface Within the dipper.

5. In an excavating dipper, the combination of a front member and a backv member having confronting side extensions, and a pair of side panels, each panel and its adjacent pair of side extensions having interlocking connections including means carried by the side extensions for confining the longitudinal edges of the panel and means carried by the panel for confining the confronting edges of the extensions.

6. In an excavating dipper, the combination of a front member and a back member having confronting side extensions, and a pair of side panels, each panel and its adjacent pair of side extensions having interlocking connections including means carried by each panel for confining the confronting edges of each adjacent pair of extensions.

7. In a dipper, the combination of a front member and a back member having confronting side extensions, and a pair of side panels, each panel havin connection with each con routing extension an interlockingv at one side of the dipper and having a bail aperture between said connections, and said front member having a projecting portion extending between said connections and provided with a bail aperture4 alined with said aperture.

8. In an excavating dipper, the combination of a front member and a back member having confronting side extensions, and a pair of side panels, each side panel overlapping tlie inner faces of a pair of extensions and having interlocking connections therewith including means carried by each panel for confining the confronting edges of each adjacent pair of extensions.

S). ln an excavating dipper, the combination of 'a front member and a back member having confronting side extensions, and a pair of' side panels, each panel overlapping the inner facesof a pair of said extensions and having interlocking connections there-l with including means carried by such extensions for confining the longitudinal edges of the panel and means carried by the panel for confining the confronting edges of the extensions.

10. In an excavating dipper, the combination of a front member and a back member having confronting side extensions, and a pair of side panels, each panel having a double interlocking connection with a pair of adjacent side extensions 'and also having projecting means abutting against the confronting edges of such extensions.

11. In an excavating dipper, the combination of a front member and a back member having confronting side extensions, and a pair of side panels, each panel overlapping the inner faces of a pair of extensions and having a double interlocking connection therewith, each extension having on its inner face a shoulder portion abutting against a longitudinal edge of the panel.

12. In an excavating dipper, the combination of afront member and a back member having confronting side extensions, and a pair of side panels, each panel overlapping llo the inner faces of an adjacent pair of extensions and having a double interlocking connection therewith, each panel also having projecting means abutting against the confronting edges of such extensions.

13. An excavating clipper comprising a front member having a` heel band connected at the lower edge thereof. said member having a 'recess confining the heel band and forming an unobstructed' surface between the heel band and the front member.

14. In an excavating clipper the combina* tion of front and back members having confronting side extensions, each adjacent pair of side extensions having oppositely formed recessed portions on the inner faces of the extensions and "orining longitudinal slioulders, and side panels fitting into said recessed portions and having the opposite longitudinal' edges confined therein and abutting against said shoulders to form unobstructed interior surfaces from front to rear of the panels.

15. An excavating dipper comprising a front member and abank member having confronting side extensions, a pair of side panels having each a double lnterlocking connection with a pair of adjacent extensions, and a latch keeper having an interlocking connection with the front member, said interlocking connections forming unobstructed surfaces between the panels, Latch keeper, and the .front and back memers.

16. An excavating dipper comprising a front member and a back member having confronting extensions, a pair of side panels each having interlocking connections with a pair of adjacent sideextensions therebj forming-an unobstructed inner surface between the panels and members, a heel band and a latch keeper connected to the lower edge of the front keeper, said heel band, keeper and front member having cooperating means forming unobstructed surfaces therebetween.

17. In an excavating dipper, the combination of a front member and a back member having confronting side extensions, a pair of side panels each having interlocking connections with a pair of adjacent side extensions, and said dipper front having a projecting portion overlapping the front-end edge of each panel.

18. An excavating dipper comprising a iront member having a heel band at the lower edge thereof, said front member having an olf-set ortion, and said heel band havlng a shou der portion engaging said off-set portion.

19. An excavating dipper comprising a front member having a recess around the lower edge thereof, a renewable heel band located in said recess, and means for interlocking said band and member together and comprlsing overlapping shoulder portions.

20. An excavating dipper comprising a front member having a. recess Aat the lower edge thereof2 and a latch kee er having a part fitting into said recess w ereby corresponding outer faces of said part and front member will extend substantially in the same plane.

21. An excavating dipper comprising a front member having exterior and interior recesses at the lower edge thereof, and a latchlkeeper bifurcated to form a pair of members fittinginto said recesses, and having the outer faces thereof substantially flush with the corresponding `faces of said member.

22. An excavating dipper comprising a front member having a recessed portion extendin around the lower part thereof, a pair o bands housed in said recess and separated to form a space at the front of the dipper, said front member having an interior recess located opposite said space, and a locking member having parts housed in said space and recess and secured to said front member.

23. In an excavating dipper the combination of front and back members having confronting side extensions, each adjacent pair of side extensions having oppositely formed recessed portions on the inner faces of the extensions and forming longitudinal shoulders, and side panels fitting into said recessed portions and having the opposite longitudinal edges confined therein and abutting against said shoulders to form unobstructed interior surfaces yfrom front to rear of the panels, said dipper front having a projecting portion overlapping the frontend edge of each panel.

24. In an excavating dipper the combination of front and back members having confronting side extensions, each adjacent pair of side extensions having oppositely formed recessed portions forming' longitudinal shoulders, and side panels fitting into said recessed portions and havin ythe opposite longitudinal edges confine therein and abuttin against said shoulders, each side panel aving an intermediate projecting portion abutting at opposite sides thereof against the confronting edges of the side extensions and forming means for confining said edges.

New York this 30th day of Signed at Nov., 1923.

' EDWARD LOUIS PEMBERTON. 

